To leave a chat room of which you’re not an owner, click on i in the top right of the room to navigate to Chat Details. Click on Options, then Members Permissions. Click on Leave Room to exit.
To leave a chat room of which you’re an owner, you will first need to remove yourself as an owner. Click on i in the top right of the room to navigate to Chat Details. Click on Members, then View members list, and hover over your name to reveal a … menu. Click the menu then, Remove as owner. Afterwards, follow the directions in the paragraph above now that you’re not an owner of the room.